TM 5-6115-323-14
CHAPTER 9
MAINTENANCE OF THE GENERATOR ASSEMBLY
9-1. Generator (AC Unit)
a. Removal.
(1) Remove the control box (para 6-3).
(2) Remove the fuel tank and bracket (paras
4-22 and 4-23).
(3) Remove the generator end cover.
(4) Using figure 6-3 as a guide, remove the
generator fan.
(5) Refer to figure 6-4 and remove the
generator stator housing.
(6) Use a proper pulling tool (fig. 5-1) and
remove the generator rotor (14, fig. 9-1 ) from the
crankshaft of the engine.
(7) Refer to figure 6-5 and remove the
generator adapter from the engine.
b. Disassembly. Refer to figure 9-1 and disas-
semble the generator.
c. Cleaning and Inspection.
(1) Clean all parts thoroughly.
(2) Inspect the stator housing for cracks,
distortion, damaged threads, elongated holes, worn
bearing seat, and other damage.
(3) Inspect the installed stators for signs of
burning, overheating, broken insulation and other
damage.
(4) Inspect the alternator rotor for scored
or burned bearing seat, distortion, and other dam-
age.
(5) Inspect the bearing for signs of heat,
rough spots when burned, fatigue or chipping, and
other damage.
(6) Replace all defective parts.
d. Assembly. Refer to figure 9-1 and assemble
the generator.
e. Installation.
(1) Refer to figure 6-5 and install the
generator adapter on the engine.
(2) Position the generator rotor (14, fig.
9-1 ) on the crankshaft of the engine.
(3) Refer to figure 6-4 and install the
(5) Install the generator end cover.
(6) Install the fuel tank and bracket (paras
4-22 and 4-23).
(7) Install the control box (para 6-3).
f.
Test
(1) Start the generator set and allow it to
warm up.
(2) Observe the voltmeter on the front of
the control box. If the exciter or stator is defec-
tive, there will be no voltage reading on the set
voltmeter.
(3) If no voltage appears on the set volt-
meter, stop the set and disconnect terminals 2 and
4 of TB 1.
Measure resistance between stator
leads T1 and T2, and T3 and T4. This reading
should be 1.32 ohms + 10%.
(3.1) Exciter stator winding resistance
should be 215 ohms ± 10% at 25° C.
(4) If resistance readings do not meet
specifications, replace stator.
If readings are as
prescribed, replace rotor.
9-2. Generator (DC Unit)
a. Removal.
(1) Remove the control box (para 6-3).
(2) Remove the fuel tank and bracket
(para 4-22 and 4-23).
(3) Remove the generator end cover.
(4) Using figure 6-3 as a guide, remove the
generator fan.
(5) Refer to figure 6-4 and remove the
generator stator housing.
(6) Use a proper pulling tool (fig. 5-1) and
remove the generator rotor (27, fig. 9-2) from the
crankshaft of the engine.
(7) Refer to figure 6-5 and remove the
generator adapter from the engine.
b. Disassembly. Refer to figure 9-2 and disas-
semble the generator.
c. Cleaning and Inspection.
(1) Clean all parts thoroughly.
generator stator housing.
(4) Refer to figure 6-3 and install the
generator fan.
Change 7
9-1
